Electron energy-loss and photoemission studies of solid C84.

Abstract

The electronic structure of pure solid ${\mathrm{C}}_{84}$ has been studied using high-energy electron energy-loss spectroscopy in transmission and photoemission spectroscopy. Information is obtained on the occupied and unoccupied \ensuremath{\sigma} and \ensuremath{\pi} bands. The reduced degeneracy of the electronic states and smaller band gap of ${\mathrm{C}}_{84}$ in comparison with ${\mathrm{C}}_{60}$ are evident, as well as the excitonic nature of the transition across the band gap of solid ${\mathrm{C}}_{84}$.